Driving connection for drill-spindles.



W. R. FOX. DRIVING CONNECTION FOR LDRILL SPINDLES APPucATloN man Novfzz. 1915. v

Patented July 24, 1917.

HIM

WILLIAM R. FOX, 0F GRAND RAPIDS, MICHIGAN.

DRIVING- CONNEGTION FOR DRILL-SPINDLES.

meines.

Specification of- Letters Patent.

Y Patented July 24, 1917.

.Continuation of application led January 23, 1914, Serial No. 813,855. This application filed November 22,

1915., Serial No. 62,920.

To all whom It may concern.'

Be it known that I, WILLIAM R. Fox, a

citizen of the United States, residing at Grand Rapids, Michigan, have invented certain new and useful Improvements in Driving Connections for Drill-Spindles, of which between the spindledriving shaft and the drill spindle or between a flexible shaft, coupled to the driving shaft and the drill spindle, as the case may be. Y

In either case the invention consists in providing an improved, strong and e'ective slip connection between the two members, which is capable of being readily unfastened, and which, when fastened will beA secure and reliable as a coupling. j

The invention as hereinafter described is in the nature of a continuin application based on my co-pending application Serial Number 813,855 and represents improvements designed to be applied to a multiple drill of the type shown in my prior Patent No. 1,058,045.

The invention consists of the combination and arrangement of parts more fully de- .one form of the invention.

Fig. 3 is a transverse section taken on line 3 3 of Fig. 2, showing the driving pin in position.

Fig. 4 is' a vertical section taken at a 'quarter turn from the position shown inl Fig. 2.

Fig. 5 is a side elevation of the form shown in Fig. 2. I K

Fig. 'is a longitudinal section of a modified form of connection.

'of the head 2 passes.

Fig. T is a front elevation of the form shown inFig. 6, and Fig. 8 isa fragmentary, longitudinal secticnal'view taken at a quarter turn from the position shown in Fig. 6.

Referring to the drawing, in Fig. 1, a portion of the upper gear spindle box 1 is shown at the upper part of the head 2. The drill is provided with a plurality of drill spindles, one of which is shown at-3, supported by and driven from the central supporting head 2. Each drill spindle 3 is provided with an upper portion 4, which is somewhat reduced in diameter and has a bearing in the bracket 5 carried by the removable adjusting arm 6.. The adjusting arm 6 is provided with a slot 7 through which a bolt 8 carried by the lower part By n-.eans of this bolt and slot connection the arm ymay be adjusted and entirely removed when desired. In the upper gearbox 1 the driving gear spindles 9 are vertically arranged and are provided with depending portions 10 terminating in extensions below the lower surface of the gear boXand to which a shaft or coupling 11 is attached. The. shaft 11 at its lower end is attached by means of a split joint 12, which has a universal joint connection 13 with the upper part 4 of the drill spindle. At its upper end'the shaft 11 isconnected by means of a universal joint 14 with a detachable slip socket 15 to the lower depending portion 10 of the gear spindle 9. It is with the improved and novel features ofthis slip .socket 15 that the present invention treats.v Flat springs 16 are secured to the lower 'part of the socket by means of screws 17 and are provided with forked upper ends 18, which engage in suitable grooves in the outer ends of a pair of locking pins 19, provided with beveled ends 20, and passing through suitable openings 21 in the upper part of the slipY socket. The driving spindle 10 is provided with a reduced portion 22 fitting within the upper part of the detachable slip socket and a shoulder seating against the upper edge of said socket. The reduced portion 22 of the driving shaft is provided with an annular groove 23 in which vthe locking pms 19 are adapted to engage. The end of the driving spindle y10 is beveled so as to en l gage the beveled portions of the locking pins to retract them.' A pin 24 is passed .through said driving barjust below the shoulder thereof and secured thereto.l T he pin 24 engages in diametrically opposite notches 25 in the upper edge of the slip socket. This insures a driving connection v betweenl the 'spindle driving shaft and the slip socket.l It will be seen from the above description that the slip socket 15 canJ be quickly snapped onto the end of the spindle driving shaftlO and when once in place will form a perfect driving connection effective against unfastening with no relative lost motion of the parts.

Figs. 6, 7 and 8 illustrate a modified form of the invention and experience has shown that this modication possesses certain advantages not present in the form embraced lby Figs. 1 to 5 inclusive, butit will be understood that either or both forms are equally applicable to another place, for eX- v ample as a means of attaching the universal joint 13 at the lower end of the shaft 11 with the upper portion of the drill spindle 4. By providing a detachable slip joint at the point where the upper end of the spindle 4, as well as at the point-where the universal joint 14 is attached to the driving spindle 10, it is possible to easily disconnect the universal joints, both upper and lower so that the ydrill spindle proper can be entirely removed from the driving gear at the top of the machine. For the purpose of clearly bringing out .these advantages the modified' form' of slip socket is 4illustrated in Figs.'6, 7 and 8 as applied to the upper end of the spindle 4.

Referring `now to these figures the under side of the head is indicated by the horizonltal line shown in Figs. 6 and 7. The depending sleeve 15 is shown with the lower part of the` universal joint 13 at its upper end. The drill spindle 3 provided with an upper vreduced portion4 in a bearing sleeve 2 is shown and a collar 32 is further provided at the upper-end of the spindle 4 being pinned thereto as indicated at 42. This is an improvement over the.4 former construclio tion.v in that previously.. the joint itself was pinned and sewed also as a collar, but the joint nowbeing'removable it will be necessary to have the collar. The collar 32 serves a's a support for the spindle and prevents it from dropping down. The collar 32 is also esy which gives a smoother and neater Iinish to the sleeve portion of the slip socket 15 and at the same time, no projecting parts are presented upon which pieces of clothing, waste or the like might catch and tear.

i In the embodiment of the invention a transverse bore 27 is drilled, through the u pper end of the spindle 4. A pair of steel balls 26 slightly smaller than the diameter of the bore 27 are placed therein and the metal at each end of the bore 27 is upset sutliciently to permit the balls to protrude the maximum distance without permitting them to come completely out. A coiledl .wire spring 28 tends to normally press the balls 26 outwardly in opposite directions. In some instances, for example, where the device is used in a shaft that is hardened before being assembled, it may be desirable to use a sleeve or bushing 29, as shown at one side in Fig. 6. An annular groove 23 in this form is provided around the interior surface of the socket or sleeve portion 15 and it is with this'A annular groove that the balls 26 engage, being snappecl therein by the action of the coiled spring 28 when the parts are assembled.

Although two different forms of the invention have been illustrated and described as applied at diHerent ends of the split joint 1l, it is to be understood that either form is equally applicable in either place.

What I claim is 1. In a drill, the combination of a spindle, a spindle driving shaft, a rigid member carried by said shaft having portions projecting therefrom, a detachableslip socket member provided with recesses with which said portions engage, spring pressed locking means adapted to be connected to said shaft and said slip socket member and suitable connections between said slip socket member,

and the drill spindle.

2. In a drill, the combination of a spindle having a transverse bore formed near its upper end, a pair of spring pressed balls carried' within said bore adapted to project slightly beyond the surface of said shaft, a detachable slip socket member having an annular interior groove formed in its lower end with which said spring pressed balls are adapted to engage and means for driving said slip socket member, substantially as described.

3. A driving shaft having ay reduced end, a detachable slip socket member, a rigid member carried on said shaft, spring pressed locking means carried by said shaft, said slip socket member being formed with recesses adapted to receive said rigid member and further provided with a groove with whichsaid spring pressedlocking means are adapted to engage, substantially as described.

4. In a drill, the: combination of a spindle, a spindle driving shaft,l a detachable slip socket member adapted to be coupled with said driving shaft, a tongue and groove connection between said driving shaft and said slip socket member, spring pressed lock# ing means carried by one of said members, the other member having a recessed portion with which said locking means engage, and suitable connections between said slip socket member and the drill spindle, substantially as described.

5. A driving shaft, a detachable slip socket member, rigid driving means carried on said shaft, said slip socket being formed with recesses adapted to receive said rigid 15 member and spring pressed locking means adapted to detachably connect said shaft with said slip socket member.

In testimony whereof I affix my signature in presence of two witnesses.

WILLIAM R. FOX. Witnesses:

MYRA JONES, FLORENCE GERMAN. 

